Plate for secondary batteries.



No. 690,589. Ptenfed 1an. 7, 1902.

. B. kunnen. A

PLATE FUR SECONDARY BATTERIES. (Applicae'ion med Aug. s, 1901.) (NoModel.)

UNITED STATES PATENT `EEICE.

BERTHOLD KUETTNER, OF WOKING, ENGLAND.

-PLATE FOR SECONDARY BATTERIES.

SPECIFICATION forming part of Letters Patent No. 690,589, dated January7, 1902.

Application filed August 8, 1901. Serial No. 71,389. (No model.)

T0 all whom t may concern:

Be it known that I, BEETHOLD KUETTNEE, of Accumulator Industries, Ltd.,a subject of the Emperor of Germany, residing at Woking, in the countyof Surrey, England, have invented an Improved Plate for SecondaryBatteries, of which the following is a specification.

This invention relates to a plate of the Plante type for use insecondary batteries, and

provides a plate which presents a very large surface to the action ofthe electrolyte and has internal circulation and is at the same time ofgreat strength and of tivity. p

In the accompanying drawings, Figure l is an elevation of my improvedplate, showing its general appearance. Fig. 2 is a crosssection, to alargerscale; and Fig. 3 is an elevation of one part of the plate, alsoto a larger scale.

A is the rim of the plate, which, as shown in Fig. 2, is of Wedge shapein cross-section, the edge being rounded off. The body of the plate isdivided into a number of panels by the cross-bars B of diamond shape incrosssection and of equal depth to the rim. Each panel consists of alarge number of wedgeshaped ribs C of half the depth of the plate and onboth sides. These ribs cross each other in each panel, so that those atthe front may be horizontal, while the corresponding back ones arevertical, or vice versa. As shown most clearly in Fig. 3, between thecrossing ribs small spaces or holes are left, which allow theelectrolyte to circulate freely through the plate. .The ribs inalternate panels are reversed in position, as shown in Figs. 1 and 2,horizontal ribs alternating with good conducvertical ones. The plate isthus rendered as rigid as possible, resisting any tendency to 4o'buckling and making it equal in strength in all directions. As theribs, cross-bars, and rim all provide edges toward the surface ofthe'plate and thicken toward the middle, the eifect of a central core isobtained, which acts as a conductor less affected by the electrolyte tthan the surfaces of the plate where the metal is thinner.

What I claim as my invention, and desire to secure by Letters Patent,is- A 5o l. A plate of lthe Plante type for secondary batteries, dividedinto a number of panels by cross-bars of Vdiamond shape in section, eachpanel consisting of two sets of ribs Wedgeshaped in cross-sectionextending respectively from the opposite sides to half the depth of theplate and crossing each other at right angles, substantially as hereindescribed and shown.

v 2. A secondary-battery plate of the Plante 6o type, consisting oftherim A, the cross-bars` B of diamond shape in section dividing the plateinto a number of panels,fand the two sets of ribs C Wedge-shaped incross-section extending respectively from the opposite sides to half thedepth of the plate crossing each other at right angles and arrangedalternately in the panels,substantially as herein described and shown.

In witness whereof I have hereunto set my 7o hand in the presence of twowitnesses.

BERTHOLD KUETTNER.

